Patents by Inventor Enrico Maina

Enrico Maina has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Typing ribbon cartridge
    Patent number: D322272
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: December 10, 1991
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventor: Enrico Maina
  • Typing ribbon cartridge
    Patent number: D352953
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: November 29, 1994
    Assignee: Ing. C. Olivetti & C., S.p.A.
    Inventor: Enrico Maina